307
All Units
Printed in U.S.A. SEPTEMBER 2009
COPYRIGHT 2009, Heil Environmental
TANDEM O.I.G.A.I. PUMP – FRONT LOADERS, REAR LOADERS,
RECYCLE 2000, CP PYTHONS
This is the Hydraulic Controls Operate-In-
Gear-At-Idle (OIGAI) system. The pump
section (pump 1) closest to the input shaft
operates the lift and shuts off first. The
pump section (pump2) farthest from the
input shaft operates the packer and stays
on at higher RPMs.
PUMP 1 – CLOSEST
TO DRIVE SHAFT
PUMP 2 – FARTHEST
FROM DRIVE SHAFT
PRESSURE
BLOCKS
BYPASS TUBE
UNLOADER
VALVE COIL
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